cxl: Refine slice error debug messages
The PSL Slice Error Register (PSL_SERR_An) reports implementation
dependent AFU errors, in the form of a bitmap. The PSL_SERR_An
register content is printed in the form of hex dump debug message.
This patch decodes the PSL_ERR_An register contents, and prints a
specific error message for each possible error bit. It also dumps
the secondary registers AFU_ERR_An and PSL_DSISR_An, that may
contain extra debug information.
This patch also removes the large WARN message that used to report
the cxl slice error interrupt, and replaces it by a short informative
message, that draws attention to AFU implementation errors.
Signed-off-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Acked-by: Ian Munsie <imunsie@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/drivers/misc/cxl/guest.c b/drivers/misc/cxl/guest.c
index 1edba52..ee7148e 100644
--- a/drivers/misc/cxl/guest.c
+++ b/drivers/misc/cxl/guest.c
@@ -196,15 +196,18 @@
{
struct cxl_afu *afu = data;
int rc;
- u64 serr;
+ u64 serr, afu_error, dsisr;
- WARN(irq, "CXL SLICE ERROR interrupt %i\n", irq);
rc = cxl_h_get_fn_error_interrupt(afu->guest->handle, &serr);
if (rc) {
dev_crit(&afu->dev, "Couldn't read PSL_SERR_An: %d\n", rc);
return IRQ_HANDLED;
}
- dev_crit(&afu->dev, "PSL_SERR_An: 0x%.16llx\n", serr);
+ afu_error = cxl_p2n_read(afu, CXL_AFU_ERR_An);
+ dsisr = cxl_p2n_read(afu, CXL_PSL_DSISR_An);
+ cxl_afu_decode_psl_serr(afu, serr);
+ dev_crit(&afu->dev, "AFU_ERR_An: 0x%.16llx\n", afu_error);
+ dev_crit(&afu->dev, "PSL_DSISR_An: 0x%.16llx\n", dsisr);
rc = cxl_h_ack_fn_error_interrupt(afu->guest->handle, serr);
if (rc)